Peroxide deoxygenates the tissue, I believe, and kills White blood cells (that promote healing!!!). We don't recommend it for cleaning wounds. Eventhough everyone seems to think it's a necessary first aid item. I try to never use it except to "flush" it out.

Soap and water, keep it clean, triple antibiotic ointment is ok to use as well.

Use your best judgement, however. Ear wounds can be VERY difficult to heal, even minor ones. Keep a close eye on it (as I know you will!!) and don't hesitate to head to the vet if you think it's taking longer to heal than it should.

EDIT: You must have posted after I clicked "reply" and had it going. Good to know you called your vet!!